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#11
There is no partition yet.
If you want the drive to be D - first, re-assign the CD drive to a different letter. You can disregard any warnings if you do not run apps from CD (games). Otherwise...
Then, right click and create a Simple volume. You will format (NTFS) in this process. You may then assign a drive letter (also in the same process).
You may disregard the "map as a folder" option - it is a nifty trick but is mostly just that. If you needed it, you would know.